Molar excess Gibbs free energies of benzene – m-xylene mixtures

1969 ◽  
Vol 47 (4) ◽  
pp. 539-542 ◽  
Author(s):  
T. Boublík ◽  
G. C. Benson
Keyword(s):  
Free Energy ◽  
Excess Free Energy ◽  
Free Energies ◽  
Energy Data ◽  
Molar Excess ◽  
Polar Mixtures ◽  
Vapor Liquid Equilibria ◽  
Flory’S Theory ◽  
Vapor Liquid

Vapor–liquid equilibria for the system benzene – m-xylene were measured in a circulation still at 25, 37, and 50 °C. Excess free energy data were analyzed in terms of Flory's theory of non-polar mixtures.

Prediction of ternary vapor-liquid equilibria by mixing rule containing regular solution and residual excess free energy terms

1988 ◽  
Vol 42 ◽  
pp. 105-115 ◽  
Author(s):  
Katsumi Tochigi ◽  
Kiyofumi Kurihara ◽  
Kazuo Kojima
Keyword(s):  
Free Energy ◽  
Regular Solution ◽  
Excess Free Energy ◽  
Mixing Rule ◽  
Vapor Liquid Equilibria ◽  
Vapor Liquid

Excess Thermodynamic Properties of Cyclopentane – Isomeric Decalin Systems at 25 °C

1971 ◽  
Vol 49 (15) ◽  
pp. 2481-2489 ◽  
Author(s):  
D. E. G. Jones ◽  
I. A. Weeks ◽  
G. C. Benson
Keyword(s):  
Thermodynamic Properties ◽  
Excess Properties ◽  
Excess Enthalpies ◽  
Free Energies ◽  
Excess Thermodynamic Properties ◽  
Molar Excess ◽  
Vapor Liquid Equilibria ◽  
Vapor Liquid

Molar excess enthalpies and volumes of the systems cyclopentane – cis-decalin and cyclopentane – trans-decalin at 25 °C were determined by direct calorimetric and dilatometric measurements. Excess Gibbs free energies, also at 25 °C, were obtained from a study of the vapor–liquid equilibria. The excess properties of these cyclopentane systems are compared with those of their cyclohexane counterparts, and are interpreted in terms of the theory of Flory.

Molar excess enthalpies, volumes, and Gibbs free energies of methanol – isomeric butanol systems at 25 °C

1970 ◽  
Vol 48 (16) ◽  
pp. 2457-2465 ◽  
Author(s):  
Jiří Polák ◽  
Sachio Murakami ◽  
V. T. Lam ◽  
H. D. Pflug ◽  
G. C. Benson
Keyword(s):  
Hydrogen Bonding ◽  
Binary Systems ◽  
Excess Properties ◽  
Excess Enthalpies ◽  
Free Energies ◽  
Molar Excess ◽  
Tert Butanol ◽  
Vapor Liquid Equilibria ◽  
Vapor Liquid

The vapor–liquid equilibria of the 4 binary systems formed by mixing methanol with n-butanol, isobutanol, sec-butanol, and tert-butanol were investigated at 25 °C in a dynamic still with circulation. The results were used to calculate the molar excess Gibbs free energies. For the three systems containing isobutanol, sec-butanol, or tert-butanol, molar excess enthalpies and volumes were also determined (mainly at 25 °C) by direct calorimetric and dilatometric techniques. The behavior of the excess properties is discussed with reference to differences in the hydrogen bonding and in the shapes of the component molecules.

scholarly journals Temperature‐dependent vapor–liquid equilibria and solvation free energy estimation from minimal data

AIChE Journal ◽  
2020 ◽  
Vol 66 (6) ◽  
Author(s):  
Yunsie Chung ◽  
Ryan J. Gillis ◽  
William H. Green
Keyword(s):  
Free Energy ◽  
Solvation Free Energy ◽  
Temperature Dependent ◽  
Energy Estimation ◽  
Minimal Data ◽  
Vapor Liquid Equilibria ◽  
Vapor Liquid

Heats of mixing. II. Acetonitrile and nitromethane systems

1956 ◽  
Vol 9 (2) ◽  
pp. 180 ◽  
Author(s):  
I Brown ◽  
W Fock
Keyword(s):  
Free Energy ◽  
Carbon Tetrachloride ◽  
Composition Range ◽  
Excess Entropy ◽  
Excess Free Energy ◽  
Energy Data ◽  
Entropy Of Mixing ◽  
Heats Of Mixing

The heats of mixing at 45.00 �C have been measured at intervals over the whole composition range for the systems : acetonitrile+carbon tetrachloride, acetonitrile+benzene, acetonitrile +nitromethane, nitromethane + carbon tetrachloride, and nitromethane+benzene. These data, together with the excess free energy data of Brown and Smith (1954, 1955a, 1955b), have been used to calculate the excess entropy of mixing for these systems.

The rubidium chloride – sodium chloride phase diagram

1970 ◽  
Vol 48 (22) ◽  
pp. 3483-3486 ◽  
Author(s):  
A. D. Pelton ◽  
S. N. Flengas
Keyword(s):  
Phase Diagram ◽  
Free Energy ◽  
Sodium Chloride ◽  
Excess Entropy ◽  
Excess Free Energy ◽  
Thermochemical Data ◽  
Cooling Curves ◽  
Molar Excess ◽  
Energy Of Mixing ◽  
Free Energy Of Mixing

The phase diagram of the RbCl–NaCl system has been measured by the method of cooling curves. By combining these data with available thermochemical data for the system, the integral molar excess free energy of mixing at 800 °C has been calculated as ΔGE = −632XRbClXNaCl cal/mole; and the integral molar excess entropy of mixing has been calculated as ΔSE = −0.208XRbClXNaCl cal/°K mole. Estimated precisions are ±50 cal for ΔGE and ±0.05 cal/°K mole for ΔSE at XRbCl = XNaCl = 0.5.

Excess free energies of mixing at temperatures below 25°. Isopiestic measurements on the systems H2O-NaCl-Na2SO4 and H2O-NaCl-MgSO4

1971 ◽  
Vol 24 (12) ◽  
pp. 2487 ◽  
Author(s):  
CW Childs ◽  
RF Platford
Keyword(s):  
Free Energy ◽  
Vapour Pressure ◽  
Excess Free Energy ◽  
Pressure Measurements ◽  
Experimental Uncertainty ◽  
Free Energies ◽  
Isopiestic Measurements ◽  
Temperature Range ◽  
Energy Of Mixing ◽  
Free Energy Of Mixing

Isopiestic vapour pressure measurements have been made on the systems H2O-NaCl-Na2SO4 and H2O-NaCl-MgSO4 at 15� and 0�. Excess free energies of mixing the aqueous salts hare been calculated for various ionic strengths, and the results have been compared with those previously obtained at 25�. ��� Within experimental uncertainty the excess free energies of mixing of aqueous NaCl with aqueous Na2SO4 are the same at 0�, 15�, and 25�. However, the excess free energy of mixing aqueous NaCl with aqueous MgSO4 shows differences which may be just larger than experimental uncertainty over the same temperature range.

Excess molar volumes and isothermal vapor-liquid equilibria in the tetrahydrofuran with propan-1-ol and propan-2-ol systems at 298.15 K

1997 ◽  
Vol 75 (2) ◽  
pp. 207-211 ◽  
Author(s):  
Julio A. Salas ◽  
Eleuterio L. Arancibia ◽  
Miguel Katz
Keyword(s):  
Activity Coefficients ◽  
Chemical Species ◽  
Excess Molar Volumes ◽  
Experimental Results ◽  
Free Energies ◽  
Molar Volumes ◽  
Two Systems ◽  
Vapor Liquid Equilibria ◽  
Vapor Liquid

Densities and vapor-liquid equilibria were determined for tetrahydrofuran with propan-1-ol and propan-2-ol systems at 298.15 K. From the experimental results, excess molar volumes and excess Gibbs free energies were calculated. Information could be obtained from the possible interaction between both chemical species in the two systems. The Prigogine–Flory–Patterson method was applied to calculate excess molar volumes. Liquid activity coefficients were calculated and correlated with different expressions existing in the literature. Keywords: excess molar volumes, vapor–liquid equilibria, activity coefficients, excess Gibbs free energies, tetrahydrofuran, propan-1-ol, propan-2-ol.

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